Rails 4: before_filter vs. before_action

Question

In rails >4.0.0 generators creates CRUD operations with before_action not before_filter. It seems to do the same thing. So what's the difference between these two?

Answer 1

As we can see in ActionController::Base, before_action is just a new syntax for before_filter.

However the before_filter syntax is deprecated in Rails 5.0 and will be removed in Rails 5.1